Does Xilingele need to bring a cotton-padded jacket in early July?

No need. Xilingol region belongs to Inner Mongolia grassland region, with dry climate and high temperature in summer. You don't need to bring a cotton-padded jacket to go in early July. Wear comfortable and breathable summer clothes, such as short-sleeved shirts, T-shirts, shorts, thin skirts, etc., and choose light fabrics, such as cotton or breathable fiber materials, to keep cool and comfortable. Due to the strong sunshine in Xilin Gol area, it is recommended to wear a wide-brimmed hat, sunglasses and sunscreen to prevent direct sunlight and ultraviolet rays.